Brushless motor sine wave three-mode 17A 6-tube controller. controller kit is suitable for 250W/350W motors. And suitable for DIY electric bikes, electric cars, electric , folding bikes, etc. The bicycle lithium battery conversion kit greatly enhances the driving and is suitable for bicycle enthusiasts. Excellent features: During driving the product displays a lot of useful data about the bike, such as on/off buttons, light switches, battery level indicator and other functions. The instrument has a display. Excellent performance: The S800 meter is made of high quality material, which is light, strong, well made, tough, waterproof and provides excellent protection for the internal circuitry. Good heat dissipation: The controller housing is made of high quality aluminium alloy with a recessed design, which protects the internal circuitry from thermal loads due to good heat dissipation. Material: metal+plastic colour: As shown Package Contents: 1 x 17A controller 1 x S800 meter 1 x 109R thumb throttle 1 x 8C boost sensor 1 x 1 drag 2 Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.